utility.cc revision 5498
1/* 2 * Copyright (c) 2003-2005 The Regents of The University of Michigan 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; 9 * redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution; 12 * neither the name of the copyright holders nor the names of its 13 * contributors may be used to endorse or promote products derived from 14 * this software without specific prior written permission. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Gabe Black 29 * Ali Saidi 30 */ 31 32#include "arch/sparc/utility.hh" 33#if FULL_SYSTEM 34#include "arch/sparc/vtophys.hh" 35#include "mem/vport.hh" 36#endif 37 38namespace SparcISA { 39 40 41//The caller uses %o0-%05 for the first 6 arguments even if their floating 42//point. Double precision floating point values take two registers/args. 43//Quads, structs, and unions are passed as pointers. All arguments beyond 44//the sixth are passed on the stack past the 16 word window save area, 45//space for the struct/union return pointer, and space reserved for the 46//first 6 arguments which the caller may use but doesn't have to. 47uint64_t getArgument(ThreadContext *tc, int number, bool fp) { 48#if FULL_SYSTEM 49 if (number < NumArgumentRegs) { 50 return tc->readIntReg(ArgumentReg[number]); 51 } else { 52 Addr sp = tc->readIntReg(StackPointerReg); 53 VirtualPort *vp = tc->getVirtPort(); 54 uint64_t arg = vp->read<uint64_t>(sp + 92 + 55 (number-NumArgumentRegs) * sizeof(uint64_t)); 56 tc->delVirtPort(vp); 57 return arg; 58 } 59#else 60 panic("getArgument() only implemented for FULL_SYSTEM\n"); 61 M5_DUMMY_RETURN 62#endif 63} 64} //namespace SPARC_ISA 65